| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [v-ing] [to-vb] [prep] | 530 |
|
| 2 | [be] [v-ing] [to-vb] at | 225 |
|
| 3 | be [v-ing] [to-vb] at | 225 |
|
| 4 | is [verb] [to-vb] at | 116 |
|
| 5 | [is] [v-ing] [to-vb] at | 40 |
|
| 6 | is [v-ing] [verb] at | 21 |
|
